Modded wii ?

Is there a way to tell if your wii is modded? I bought a used wii that seems to be semi-bricked. I don't know if it is modded or not. I cannot get to the settings menu. It is recommended to reinstall a new system like 4.1. Can i install this system using bannerbomb even if it is hard modded? I don't know which system is in it. Thnaks